./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnifrev.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnifrev.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:33:51,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:33:51,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:33:51,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:33:51,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:33:51,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:33:51,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:33:51,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:33:51,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:33:51,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:33:51,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:33:51,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:33:51,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:33:51,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:33:51,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:33:51,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:33:51,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:33:51,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:33:51,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:33:51,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:33:51,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:33:51,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:33:51,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:33:51,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:33:51,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:33:51,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:33:51,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:33:51,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:33:51,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:33:51,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:33:51,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:33:51,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:33:51,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:33:51,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:33:51,964 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:33:51,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:33:51,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:33:51,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:33:51,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:33:51,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:33:51,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:33:51,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:33:52,024 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:33:52,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:33:52,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:33:52,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:33:52,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:33:52,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:33:52,039 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:33:52,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:33:52,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:33:52,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:33:52,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:33:52,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:33:52,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:33:52,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:33:52,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:33:52,043 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:33:52,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:33:52,043 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:33:52,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:33:52,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:33:52,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:33:52,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:33:52,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:33:52,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:33:52,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:33:52,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:33:52,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:33:52,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:33:52,046 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:33:52,049 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:33:52,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:33:52,050 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:33:52,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed [2021-11-07 07:33:52,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:33:52,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:33:52,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:33:52,403 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:33:52,405 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:33:52,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/array-tiling/rewnifrev.c [2021-11-07 07:33:52,529 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/data/e0224981d/8ed9c4aeb4b748829f0789d8e8b40423/FLAG3ee63ea6f [2021-11-07 07:33:53,146 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:33:53,148 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/sv-benchmarks/c/array-tiling/rewnifrev.c [2021-11-07 07:33:53,162 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/data/e0224981d/8ed9c4aeb4b748829f0789d8e8b40423/FLAG3ee63ea6f [2021-11-07 07:33:53,491 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/data/e0224981d/8ed9c4aeb4b748829f0789d8e8b40423 [2021-11-07 07:33:53,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:33:53,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:33:53,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:33:53,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:33:53,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:33:53,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d80f669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53, skipping insertion in model container [2021-11-07 07:33:53,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:33:53,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:33:53,740 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/sv-benchmarks/c/array-tiling/rewnifrev.c[400,413] [2021-11-07 07:33:53,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:33:53,766 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:33:53,780 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/sv-benchmarks/c/array-tiling/rewnifrev.c[400,413] [2021-11-07 07:33:53,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:33:53,805 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:33:53,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53 WrapperNode [2021-11-07 07:33:53,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:33:53,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:33:53,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:33:53,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:33:53,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:33:53,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:33:53,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:33:53,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:33:53,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:33:53,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:33:53,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:33:53,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:33:53,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (1/1) ... [2021-11-07 07:33:53,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:33:53,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:53,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:33:53,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:33:54,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:33:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:33:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 07:33:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:33:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:33:54,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:33:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 07:33:54,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:33:54,298 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-07 07:33:54,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:54 BoogieIcfgContainer [2021-11-07 07:33:54,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:33:54,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:33:54,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:33:54,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:33:54,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:33:53" (1/3) ... [2021-11-07 07:33:54,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298bdd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:54, skipping insertion in model container [2021-11-07 07:33:54,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:53" (2/3) ... [2021-11-07 07:33:54,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@298bdd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:54, skipping insertion in model container [2021-11-07 07:33:54,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:54" (3/3) ... [2021-11-07 07:33:54,311 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2021-11-07 07:33:54,318 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:33:54,318 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:33:54,428 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:33:54,437 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:33:54,437 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:33:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:33:54,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:54,468 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:54,469 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:54,487 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2021-11-07 07:33:54,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:54,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515578762] [2021-11-07 07:33:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:54,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:33:54,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:54,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515578762] [2021-11-07 07:33:54,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515578762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:33:54,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:33:54,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:33:54,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468793526] [2021-11-07 07:33:54,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 07:33:54,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 07:33:54,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:33:54,757 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:54,775 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2021-11-07 07:33:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:33:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 07:33:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:54,788 INFO L225 Difference]: With dead ends: 29 [2021-11-07 07:33:54,788 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 07:33:54,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 07:33:54,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 07:33:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-07 07:33:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-07 07:33:54,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-11-07 07:33:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:54,834 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-07 07:33:54,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-07 07:33:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:33:54,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:54,837 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:54,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:33:54,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2021-11-07 07:33:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:54,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839706007] [2021-11-07 07:33:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:54,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:33:55,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:55,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839706007] [2021-11-07 07:33:55,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839706007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:33:55,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:33:55,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:33:55,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024774854] [2021-11-07 07:33:55,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:33:55,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:55,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:33:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:33:55,024 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:55,089 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-11-07 07:33:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:33:55,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 07:33:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:55,093 INFO L225 Difference]: With dead ends: 29 [2021-11-07 07:33:55,093 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 07:33:55,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:33:55,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 07:33:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-11-07 07:33:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-07 07:33:55,104 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-11-07 07:33:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:55,105 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-07 07:33:55,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-07 07:33:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:33:55,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:55,109 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:55,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:33:55,110 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:55,113 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2021-11-07 07:33:55,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:55,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040210380] [2021-11-07 07:33:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:55,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:55,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:33:55,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:55,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040210380] [2021-11-07 07:33:55,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040210380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:33:55,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:33:55,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 07:33:55,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199389820] [2021-11-07 07:33:55,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:33:55,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:33:55,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:33:55,230 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:55,274 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-07 07:33:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:33:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 07:33:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:55,276 INFO L225 Difference]: With dead ends: 32 [2021-11-07 07:33:55,276 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 07:33:55,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:33:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 07:33:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-11-07 07:33:55,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-07 07:33:55,283 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-07 07:33:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:55,283 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-07 07:33:55,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-07 07:33:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:33:55,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:55,285 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:55,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:33:55,286 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:55,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:55,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2021-11-07 07:33:55,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:55,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106915620] [2021-11-07 07:33:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:55,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 07:33:55,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:55,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106915620] [2021-11-07 07:33:55,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106915620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:33:55,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:33:55,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-07 07:33:55,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500327264] [2021-11-07 07:33:55,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:33:55,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:33:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:33:55,593 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:55,732 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-11-07 07:33:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:33:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 07:33:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:55,734 INFO L225 Difference]: With dead ends: 27 [2021-11-07 07:33:55,735 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 07:33:55,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:33:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 07:33:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-07 07:33:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-07 07:33:55,742 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-11-07 07:33:55,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:55,743 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-07 07:33:55,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:55,743 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-07 07:33:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:33:55,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:55,745 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:55,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:33:55,746 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2021-11-07 07:33:55,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:55,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997928793] [2021-11-07 07:33:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:55,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:33:56,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:56,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997928793] [2021-11-07 07:33:56,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997928793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:56,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278728874] [2021-11-07 07:33:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:56,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:56,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:56,029 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:56,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:33:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:56,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:33:56,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:56,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:33:56,607 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-07 07:33:56,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-07 07:33:56,899 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-07 07:33:56,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-07 07:33:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:33:56,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278728874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:56,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:56,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-07 07:33:56,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614187309] [2021-11-07 07:33:56,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:33:56,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:56,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:33:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:33:56,958 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:57,489 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-11-07 07:33:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:33:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 07:33:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:57,491 INFO L225 Difference]: With dead ends: 33 [2021-11-07 07:33:57,491 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 07:33:57,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:33:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 07:33:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-11-07 07:33:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-07 07:33:57,499 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2021-11-07 07:33:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:57,499 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-07 07:33:57,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-07 07:33:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:33:57,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:57,501 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:57,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:57,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:57,721 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2021-11-07 07:33:57,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:57,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933253830] [2021-11-07 07:33:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:57,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:33:57,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:57,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933253830] [2021-11-07 07:33:57,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933253830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:57,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164600769] [2021-11-07 07:33:57,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:33:57,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:57,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:57,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:57,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:33:57,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:33:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:57,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:33:57,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:58,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:33:58,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164600769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:58,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:33:58,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-11-07 07:33:58,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028838225] [2021-11-07 07:33:58,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:33:58,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:33:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:33:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:33:58,110 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:58,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:33:58,224 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-11-07 07:33:58,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:33:58,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 07:33:58,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:33:58,226 INFO L225 Difference]: With dead ends: 56 [2021-11-07 07:33:58,226 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 07:33:58,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:33:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 07:33:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-11-07 07:33:58,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-07 07:33:58,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-11-07 07:33:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:33:58,247 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-07 07:33:58,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:33:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-07 07:33:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:33:58,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:33:58,249 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:33:58,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:33:58,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:58,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:33:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:33:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2021-11-07 07:33:58,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:33:58,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332312406] [2021-11-07 07:33:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:33:58,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:33:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:33:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:33:58,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:33:58,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332312406] [2021-11-07 07:33:58,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332312406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:33:58,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087560667] [2021-11-07 07:33:58,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:33:58,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:33:58,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:33:58,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:33:58,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:33:58,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:33:58,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:33:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:33:58,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:33:59,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:33:59,198 INFO L354 Elim1Store]: treesize reduction 31, result has 40.4 percent of original size [2021-11-07 07:33:59,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 49 [2021-11-07 07:33:59,340 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-11-07 07:33:59,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 63 [2021-11-07 07:34:00,016 INFO L354 Elim1Store]: treesize reduction 105, result has 29.5 percent of original size [2021-11-07 07:34:00,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 92 [2021-11-07 07:34:01,681 INFO L354 Elim1Store]: treesize reduction 76, result has 3.8 percent of original size [2021-11-07 07:34:01,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 55 [2021-11-07 07:34:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:01,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087560667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:01,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-11-07 07:34:01,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271913676] [2021-11-07 07:34:01,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:34:01,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:34:01,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:34:01,767 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:03,783 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-11-07 07:34:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:34:03,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 07:34:03,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:03,785 INFO L225 Difference]: With dead ends: 65 [2021-11-07 07:34:03,785 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 07:34:03,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=433, Invalid=2219, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:34:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 07:34:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-11-07 07:34:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-07 07:34:03,797 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2021-11-07 07:34:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:03,798 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-07 07:34:03,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-07 07:34:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:34:03,799 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:03,800 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:03,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:04,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-07 07:34:04,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 4 times [2021-11-07 07:34:04,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:04,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420176514] [2021-11-07 07:34:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:04,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:04,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:04,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420176514] [2021-11-07 07:34:04,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420176514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:04,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861014153] [2021-11-07 07:34:04,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:34:04,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:04,848 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:04,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:34:05,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:34:05,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:34:05,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:05,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:34:05,136 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:34:05,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:34:05,242 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:34:05,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:34:05,448 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:34:05,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:34:05,589 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:34:05,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:34:06,040 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:34:06,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 77 treesize of output 74 [2021-11-07 07:34:07,335 INFO L354 Elim1Store]: treesize reduction 134, result has 2.2 percent of original size [2021-11-07 07:34:07,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 49 [2021-11-07 07:34:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:07,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861014153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:07,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:07,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 32 [2021-11-07 07:34:07,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144283164] [2021-11-07 07:34:07,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:34:07,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:34:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:34:07,401 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:09,375 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2021-11-07 07:34:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 07:34:09,375 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 07:34:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:09,377 INFO L225 Difference]: With dead ends: 98 [2021-11-07 07:34:09,377 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:34:09,380 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=840, Invalid=3450, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:34:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:34:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 45. [2021-11-07 07:34:09,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:09,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-07 07:34:09,395 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2021-11-07 07:34:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:09,396 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-07 07:34:09,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:09,397 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-07 07:34:09,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:34:09,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:09,399 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:09,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:09,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 07:34:09,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:09,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 5 times [2021-11-07 07:34:09,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:09,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959478378] [2021-11-07 07:34:09,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:09,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:09,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:09,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959478378] [2021-11-07 07:34:09,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959478378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:09,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677215360] [2021-11-07 07:34:09,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:34:09,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:09,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:09,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:09,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:34:10,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 07:34:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:34:10,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:10,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677215360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:10,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:10,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2021-11-07 07:34:10,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427606719] [2021-11-07 07:34:10,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:34:10,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:10,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:34:10,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:34:10,349 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:10,522 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-11-07 07:34:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:34:10,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 07:34:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:10,524 INFO L225 Difference]: With dead ends: 91 [2021-11-07 07:34:10,524 INFO L226 Difference]: Without dead ends: 47 [2021-11-07 07:34:10,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:34:10,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-07 07:34:10,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-11-07 07:34:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:10,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-11-07 07:34:10,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2021-11-07 07:34:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:10,535 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-11-07 07:34:10,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-11-07 07:34:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:34:10,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:10,537 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:10,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:10,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:10,757 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:10,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 6 times [2021-11-07 07:34:10,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:10,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916431751] [2021-11-07 07:34:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:10,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:11,403 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:11,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:11,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916431751] [2021-11-07 07:34:11,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916431751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:11,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457823116] [2021-11-07 07:34:11,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:34:11,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:11,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:11,404 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:11,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:34:11,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-07 07:34:11,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:34:11,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:11,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:34:11,808 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:34:11,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:34:11,884 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:34:11,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:34:12,035 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:34:12,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:34:12,127 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:34:12,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:34:12,374 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:34:12,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:34:12,542 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:34:12,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:34:13,064 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:34:13,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 91 treesize of output 91 [2021-11-07 07:34:14,919 INFO L354 Elim1Store]: treesize reduction 208, result has 1.4 percent of original size [2021-11-07 07:34:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 54 [2021-11-07 07:34:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 34 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:14,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457823116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:14,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:14,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 35 [2021-11-07 07:34:14,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257452586] [2021-11-07 07:34:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:34:14,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:14,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:34:14,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:34:14,974 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:17,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:17,394 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-11-07 07:34:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 07:34:17,395 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 07:34:17,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:17,396 INFO L225 Difference]: With dead ends: 99 [2021-11-07 07:34:17,396 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 07:34:17,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=968, Invalid=5038, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:34:17,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 07:34:17,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 49. [2021-11-07 07:34:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-07 07:34:17,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2021-11-07 07:34:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:17,422 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-07 07:34:17,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 35 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-07 07:34:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:34:17,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:17,426 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:17,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:17,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:17,641 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:17,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 7 times [2021-11-07 07:34:17,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:17,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599376044] [2021-11-07 07:34:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:17,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:17,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:17,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599376044] [2021-11-07 07:34:17,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599376044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:17,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560225400] [2021-11-07 07:34:17,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:34:17,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:17,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:17,760 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:17,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:34:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:18,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:34:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:18,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560225400] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:18,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:18,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-11-07 07:34:18,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779498964] [2021-11-07 07:34:18,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:34:18,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:18,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:34:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:34:18,503 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:18,665 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-11-07 07:34:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:34:18,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 07:34:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:18,668 INFO L225 Difference]: With dead ends: 92 [2021-11-07 07:34:18,668 INFO L226 Difference]: Without dead ends: 55 [2021-11-07 07:34:18,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:34:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-07 07:34:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-11-07 07:34:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-11-07 07:34:18,692 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2021-11-07 07:34:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:18,693 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-11-07 07:34:18,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-11-07 07:34:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:34:18,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:18,695 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:18,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:18,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:34:18,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 8 times [2021-11-07 07:34:18,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:18,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733251719] [2021-11-07 07:34:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:18,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:19,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:19,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733251719] [2021-11-07 07:34:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733251719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:19,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538676751] [2021-11-07 07:34:19,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:34:19,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:19,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:19,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:19,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:34:19,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:34:19,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:34:19,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:19,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:34:20,083 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:34:20,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:34:20,162 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:34:20,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:34:20,345 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:34:20,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:34:20,469 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:34:20,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:34:20,699 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:34:20,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:34:20,834 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:34:20,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:34:21,098 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:34:21,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:34:21,298 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:34:21,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:34:21,933 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:34:21,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 105 treesize of output 108 [2021-11-07 07:34:23,958 INFO L354 Elim1Store]: treesize reduction 298, result has 1.0 percent of original size [2021-11-07 07:34:23,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 59 [2021-11-07 07:34:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 52 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:24,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538676751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:24,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:24,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 27] total 39 [2021-11-07 07:34:24,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222454497] [2021-11-07 07:34:24,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:34:24,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:34:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:34:24,032 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:27,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:27,344 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-07 07:34:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 07:34:27,345 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 07:34:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:27,348 INFO L225 Difference]: With dead ends: 116 [2021-11-07 07:34:27,348 INFO L226 Difference]: Without dead ends: 114 [2021-11-07 07:34:27,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 31 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1237, Invalid=7135, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 07:34:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-07 07:34:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 57. [2021-11-07 07:34:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:27,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-11-07 07:34:27,366 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2021-11-07 07:34:27,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:27,366 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-11-07 07:34:27,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 39 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:27,367 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-11-07 07:34:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:34:27,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:27,368 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:27,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:27,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:34:27,569 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:27,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 9 times [2021-11-07 07:34:27,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:27,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35289291] [2021-11-07 07:34:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:27,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:27,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:27,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35289291] [2021-11-07 07:34:27,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35289291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:27,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084968622] [2021-11-07 07:34:27,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:34:27,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:27,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:27,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:27,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:34:28,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-07 07:34:28,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:28,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:34:28,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:28,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084968622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:28,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:28,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-11-07 07:34:28,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80883631] [2021-11-07 07:34:28,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:34:28,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:28,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:34:28,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:34:28,827 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:28,977 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-11-07 07:34:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:34:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 07:34:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:28,979 INFO L225 Difference]: With dead ends: 104 [2021-11-07 07:34:28,979 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 07:34:28,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:34:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 07:34:28,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-11-07 07:34:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-11-07 07:34:28,994 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2021-11-07 07:34:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:28,995 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-11-07 07:34:28,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-11-07 07:34:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 07:34:28,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:28,997 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:29,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:29,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 07:34:29,212 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:29,213 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 10 times [2021-11-07 07:34:29,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:29,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386313996] [2021-11-07 07:34:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:29,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 29 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:30,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:30,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386313996] [2021-11-07 07:34:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386313996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:30,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669932952] [2021-11-07 07:34:30,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:34:30,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:30,203 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:30,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:34:30,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:34:30,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:30,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 07:34:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:30,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:34:30,868 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:34:30,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:34:30,939 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:34:30,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:34:31,139 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:34:31,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:34:31,273 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:34:31,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:34:31,472 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:34:31,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:34:31,601 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:34:31,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:34:31,850 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:34:31,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:34:32,017 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:34:32,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:34:32,429 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:34:32,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:34:32,650 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:34:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:34:33,220 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:34:33,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 119 treesize of output 125 [2021-11-07 07:34:35,815 INFO L354 Elim1Store]: treesize reduction 404, result has 0.7 percent of original size [2021-11-07 07:34:35,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 64 [2021-11-07 07:34:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 74 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:35,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669932952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:35,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:35,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 31] total 47 [2021-11-07 07:34:35,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433199260] [2021-11-07 07:34:35,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 07:34:35,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:35,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 07:34:35,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1706, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:34:35,890 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:40,366 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2021-11-07 07:34:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 07:34:40,367 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 07:34:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:40,368 INFO L225 Difference]: With dead ends: 133 [2021-11-07 07:34:40,368 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 07:34:40,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 34 SyntacticMatches, 11 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3603 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1775, Invalid=9567, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:34:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 07:34:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 65. [2021-11-07 07:34:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-11-07 07:34:40,387 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2021-11-07 07:34:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:40,388 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-11-07 07:34:40,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.404255319148936) internal successors, (113), 47 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:40,389 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-11-07 07:34:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:34:40,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:40,390 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:40,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:40,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 07:34:40,601 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 11 times [2021-11-07 07:34:40,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:40,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228151021] [2021-11-07 07:34:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:40,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:40,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:40,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228151021] [2021-11-07 07:34:40,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228151021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:40,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382985880] [2021-11-07 07:34:40,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:34:40,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:40,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:40,748 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:40,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:34:41,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-07 07:34:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:34:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:42,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382985880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:42,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:42,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2021-11-07 07:34:42,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602282413] [2021-11-07 07:34:42,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:34:42,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:34:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:34:42,166 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:42,374 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-11-07 07:34:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:34:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 07:34:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:42,376 INFO L225 Difference]: With dead ends: 116 [2021-11-07 07:34:42,376 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 07:34:42,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:34:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 07:34:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-11-07 07:34:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-07 07:34:42,391 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2021-11-07 07:34:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:42,392 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-07 07:34:42,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-07 07:34:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:34:42,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:42,393 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:42,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:34:42,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:34:42,608 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:42,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 12 times [2021-11-07 07:34:42,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:42,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118309666] [2021-11-07 07:34:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:42,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:43,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:43,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118309666] [2021-11-07 07:34:43,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118309666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:43,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822882024] [2021-11-07 07:34:43,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:34:43,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:43,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:43,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:43,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:34:44,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 07:34:44,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:34:44,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 07:34:44,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:44,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:34:44,771 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:34:44,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:34:44,845 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:34:44,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:34:45,007 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:34:45,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:34:45,130 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:34:45,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:34:45,333 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:34:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:34:45,466 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:34:45,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:34:45,732 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:34:45,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:34:45,936 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:34:45,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:34:46,245 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:34:46,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:34:46,546 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:34:46,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:34:47,043 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:34:47,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:34:47,319 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:34:47,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:34:48,110 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:34:48,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 138 treesize of output 147 [2021-11-07 07:34:51,672 INFO L354 Elim1Store]: treesize reduction 638, result has 0.5 percent of original size [2021-11-07 07:34:51,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 158 treesize of output 81 [2021-11-07 07:34:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 91 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:51,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822882024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:51,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:34:51,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 35] total 49 [2021-11-07 07:34:51,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536250229] [2021-11-07 07:34:51,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 07:34:51,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:34:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 07:34:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:34:51,770 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 49 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:34:57,462 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2021-11-07 07:34:57,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 07:34:57,462 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 49 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 07:34:57,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:34:57,463 INFO L225 Difference]: With dead ends: 123 [2021-11-07 07:34:57,463 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 07:34:57,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 37 SyntacticMatches, 18 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3731 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1199, Invalid=10143, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 07:34:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 07:34:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 77. [2021-11-07 07:34:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-07 07:34:57,482 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 68 [2021-11-07 07:34:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:34:57,483 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-07 07:34:57,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 49 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:34:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-07 07:34:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 07:34:57,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:34:57,484 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:34:57,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-07 07:34:57,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:34:57,701 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:34:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:34:57,701 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 13 times [2021-11-07 07:34:57,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:34:57,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651169685] [2021-11-07 07:34:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:34:57,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:34:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:34:58,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:34:58,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651169685] [2021-11-07 07:34:58,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651169685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:34:58,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785797300] [2021-11-07 07:34:58,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:34:58,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:34:58,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:34:58,526 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:34:58,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:34:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:34:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 07:34:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:34:59,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:34:59,396 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:34:59,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:34:59,447 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:34:59,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:34:59,574 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:34:59,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:34:59,661 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:34:59,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:34:59,827 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:34:59,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:34:59,968 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:34:59,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:35:00,190 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:35:00,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:35:00,355 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:35:00,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:35:00,653 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:35:00,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:35:00,868 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:35:00,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:35:01,245 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:35:01,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:35:01,505 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:35:01,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:35:02,001 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:35:02,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:35:02,370 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:35:02,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:35:03,182 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:35:03,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 147 treesize of output 159 [2021-11-07 07:35:07,223 INFO L354 Elim1Store]: treesize reduction 664, result has 0.4 percent of original size [2021-11-07 07:35:07,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 145 treesize of output 74 [2021-11-07 07:35:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 130 proven. 151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:07,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785797300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:07,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:35:07,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 39] total 54 [2021-11-07 07:35:07,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124816109] [2021-11-07 07:35:07,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 07:35:07,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 07:35:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=2336, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:35:07,308 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 54 states, 54 states have (on average 2.759259259259259) internal successors, (149), 54 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:15,579 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2021-11-07 07:35:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 07:35:15,579 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.759259259259259) internal successors, (149), 54 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 07:35:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:15,581 INFO L225 Difference]: With dead ends: 172 [2021-11-07 07:35:15,581 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 07:35:15,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 47 SyntacticMatches, 21 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6203 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=2432, Invalid=15928, Unknown=0, NotChecked=0, Total=18360 [2021-11-07 07:35:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 07:35:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 81. [2021-11-07 07:35:15,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-11-07 07:35:15,604 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 76 [2021-11-07 07:35:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:15,605 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-11-07 07:35:15,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.759259259259259) internal successors, (149), 54 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-11-07 07:35:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:35:15,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:15,607 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:15,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:35:15,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:35:15,816 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash 2057478922, now seen corresponding path program 14 times [2021-11-07 07:35:15,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:15,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703326632] [2021-11-07 07:35:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:15,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:15,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:15,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703326632] [2021-11-07 07:35:15,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703326632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:15,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377187942] [2021-11-07 07:35:15,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:35:15,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:35:15,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:35:15,987 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:35:15,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:35:17,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:35:17,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:35:17,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:35:17,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:35:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:17,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377187942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:17,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:35:17,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2021-11-07 07:35:17,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82206110] [2021-11-07 07:35:17,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:35:17,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:35:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:35:17,650 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:17,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:17,909 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2021-11-07 07:35:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:35:17,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 07:35:17,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:17,911 INFO L225 Difference]: With dead ends: 147 [2021-11-07 07:35:17,911 INFO L226 Difference]: Without dead ends: 87 [2021-11-07 07:35:17,911 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=417, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:35:17,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-07 07:35:17,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-11-07 07:35:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-11-07 07:35:17,926 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2021-11-07 07:35:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:17,927 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-11-07 07:35:17,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-11-07 07:35:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 07:35:17,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:17,929 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:17,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:35:18,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:35:18,129 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 15 times [2021-11-07 07:35:18,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:18,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956968944] [2021-11-07 07:35:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:18,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 28 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:19,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:19,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956968944] [2021-11-07 07:35:19,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956968944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:19,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886231899] [2021-11-07 07:35:19,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:35:19,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:35:19,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:35:19,027 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:35:19,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:35:20,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 07:35:20,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:35:20,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:35:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:35:20,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:35:20,901 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:35:20,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:35:20,989 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:35:20,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:35:21,202 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:35:21,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:35:21,338 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:35:21,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:35:21,628 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:35:21,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:35:21,806 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:35:21,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:35:22,147 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:35:22,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:35:22,339 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:35:22,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:35:22,660 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:35:22,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:35:22,868 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:35:22,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:35:23,228 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:35:23,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:35:23,458 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:35:23,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:35:23,893 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:35:23,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:35:24,232 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:35:24,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:35:24,727 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:35:24,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:35:25,134 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:35:25,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:35:25,940 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:35:25,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 166 treesize of output 181 [2021-11-07 07:35:31,181 INFO L354 Elim1Store]: treesize reduction 948, result has 0.3 percent of original size [2021-11-07 07:35:31,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 171 treesize of output 79 [2021-11-07 07:35:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:31,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886231899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:31,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:35:31,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 43] total 59 [2021-11-07 07:35:31,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850798059] [2021-11-07 07:35:31,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 07:35:31,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 07:35:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3012, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:35:31,305 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:35:37,305 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2021-11-07 07:35:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-07 07:35:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 07:35:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:35:37,307 INFO L225 Difference]: With dead ends: 150 [2021-11-07 07:35:37,307 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 07:35:37,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 45 SyntacticMatches, 24 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4758 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1354, Invalid=13166, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 07:35:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 07:35:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-11-07 07:35:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2021-11-07 07:35:37,321 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 84 [2021-11-07 07:35:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:35:37,321 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2021-11-07 07:35:37,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.7966101694915255) internal successors, (165), 59 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:35:37,322 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2021-11-07 07:35:37,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 07:35:37,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:35:37,323 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:35:37,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-07 07:35:37,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:35:37,529 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:35:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:35:37,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 16 times [2021-11-07 07:35:37,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:35:37,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411993268] [2021-11-07 07:35:37,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:35:37,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:35:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:35:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:38,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:35:38,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411993268] [2021-11-07 07:35:38,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411993268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:38,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741822557] [2021-11-07 07:35:38,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:35:38,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:35:38,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:35:38,298 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:35:38,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:35:39,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:35:39,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:35:39,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 07:35:39,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:35:39,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:35:39,675 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:35:39,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:35:39,727 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:35:39,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:35:39,852 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:35:39,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:35:39,932 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:35:39,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:35:40,092 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:35:40,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:35:40,197 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:35:40,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:35:40,397 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:35:40,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:35:40,532 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:35:40,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:35:40,787 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:35:40,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:35:40,990 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:35:40,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:35:41,317 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:35:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:35:41,528 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:35:41,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:35:41,899 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:35:41,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:35:42,159 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:35:42,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:35:42,670 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:35:42,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:35:43,045 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:35:43,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:35:43,657 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:35:43,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:35:44,099 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:35:44,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:35:45,165 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:35:45,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 175 treesize of output 193 [2021-11-07 07:35:50,324 INFO L354 Elim1Store]: treesize reduction 988, result has 0.3 percent of original size [2021-11-07 07:35:50,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 171 treesize of output 84 [2021-11-07 07:35:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 202 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:35:50,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741822557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:35:50,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:35:50,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 47] total 64 [2021-11-07 07:35:50,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962458331] [2021-11-07 07:35:50,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 07:35:50,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:35:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 07:35:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=3306, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:35:50,411 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 64 states, 64 states have (on average 2.828125) internal successors, (181), 64 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:00,429 INFO L93 Difference]: Finished difference Result 206 states and 222 transitions. [2021-11-07 07:36:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-07 07:36:00,430 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.828125) internal successors, (181), 64 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 07:36:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:00,431 INFO L225 Difference]: With dead ends: 206 [2021-11-07 07:36:00,431 INFO L226 Difference]: Without dead ends: 204 [2021-11-07 07:36:00,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 57 SyntacticMatches, 27 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9208 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3388, Invalid=23344, Unknown=0, NotChecked=0, Total=26732 [2021-11-07 07:36:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-07 07:36:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 97. [2021-11-07 07:36:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-11-07 07:36:00,455 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 92 [2021-11-07 07:36:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:00,455 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-11-07 07:36:00,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.828125) internal successors, (181), 64 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-11-07 07:36:00,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 07:36:00,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:00,457 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:00,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:00,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:00,672 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 17 times [2021-11-07 07:36:00,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:00,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794034901] [2021-11-07 07:36:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:00,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:00,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:00,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794034901] [2021-11-07 07:36:00,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794034901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:00,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868765388] [2021-11-07 07:36:00,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:36:00,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:00,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:00,865 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:00,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:36:02,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:36:02,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:02,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:36:02,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:03,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868765388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:03,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:03,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 28 [2021-11-07 07:36:03,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942649749] [2021-11-07 07:36:03,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:36:03,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:36:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:36:03,281 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:36:03,495 INFO L93 Difference]: Finished difference Result 171 states and 178 transitions. [2021-11-07 07:36:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:36:03,496 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 07:36:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:36:03,496 INFO L225 Difference]: With dead ends: 171 [2021-11-07 07:36:03,496 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 07:36:03,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:36:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 07:36:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-11-07 07:36:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-11-07 07:36:03,512 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 96 [2021-11-07 07:36:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:36:03,512 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-11-07 07:36:03,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:36:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-11-07 07:36:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 07:36:03,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:36:03,514 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:36:03,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:36:03,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:36:03,727 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:36:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:36:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 18 times [2021-11-07 07:36:03,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:36:03,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113028335] [2021-11-07 07:36:03,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:36:03,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:36:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:36:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 31 proven. 487 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:05,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:36:05,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113028335] [2021-11-07 07:36:05,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113028335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:05,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795322316] [2021-11-07 07:36:05,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:36:05,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:36:05,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:36:05,442 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:36:05,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:36:08,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:36:08,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:36:08,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-07 07:36:08,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:36:08,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:36:08,110 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:36:08,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:36:08,165 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:36:08,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:36:08,292 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:36:08,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:36:08,384 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:36:08,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:36:08,565 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:36:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:36:08,674 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:36:08,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:36:09,034 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:36:09,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:36:09,173 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:36:09,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:36:09,434 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:36:09,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:36:09,603 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:36:09,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:36:09,923 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:36:09,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:36:10,174 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:36:10,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:36:10,552 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:36:10,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:36:10,823 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:36:10,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:36:11,266 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:36:11,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:36:11,587 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:36:11,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:36:12,135 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:36:12,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:36:12,536 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:36:12,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:36:13,196 INFO L354 Elim1Store]: treesize reduction 1450, result has 8.3 percent of original size [2021-11-07 07:36:13,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 201 [2021-11-07 07:36:13,680 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:36:13,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 183 treesize of output 204 [2021-11-07 07:36:14,755 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:36:14,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 189 treesize of output 210 [2021-11-07 07:36:20,353 INFO L354 Elim1Store]: treesize reduction 1354, result has 0.2 percent of original size [2021-11-07 07:36:20,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 199 treesize of output 89 [2021-11-07 07:36:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 244 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:36:20,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795322316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:36:20,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:36:20,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 50] total 80 [2021-11-07 07:36:20,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971031088] [2021-11-07 07:36:20,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 07:36:20,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:36:20,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 07:36:20,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=5629, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:36:20,440 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 80 states, 80 states have (on average 2.4625) internal successors, (197), 80 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:28,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:28,352 INFO L93 Difference]: Finished difference Result 532 states and 608 transitions. [2021-11-07 07:37:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 335 states. [2021-11-07 07:37:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.4625) internal successors, (197), 80 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 07:37:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:28,356 INFO L225 Difference]: With dead ends: 532 [2021-11-07 07:37:28,357 INFO L226 Difference]: Without dead ends: 530 [2021-11-07 07:37:28,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 127 SyntacticMatches, 19 SemanticMatches, 406 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66543 ImplicationChecksByTransitivity, 63.0s TimeCoverageRelationStatistics Valid=16213, Invalid=149843, Unknown=0, NotChecked=0, Total=166056 [2021-11-07 07:37:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-07 07:37:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 105. [2021-11-07 07:37:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-11-07 07:37:28,402 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2021-11-07 07:37:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:28,402 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-11-07 07:37:28,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.4625) internal successors, (197), 80 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-11-07 07:37:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 07:37:28,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:28,404 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:28,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:28,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:28,617 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:28,617 INFO L85 PathProgramCache]: Analyzing trace with hash -216366051, now seen corresponding path program 19 times [2021-11-07 07:37:28,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:28,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345210482] [2021-11-07 07:37:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:28,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 243 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:28,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:28,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345210482] [2021-11-07 07:37:28,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345210482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:28,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599261522] [2021-11-07 07:37:28,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:37:28,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:28,876 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:28,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:37:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:31,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:37:31,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:31,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599261522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:31,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:31,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28] total 30 [2021-11-07 07:37:31,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490664619] [2021-11-07 07:37:31,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:37:31,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:31,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:37:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:37:31,980 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 30 states, 30 states have (on average 5.133333333333334) internal successors, (154), 30 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:37:32,333 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2021-11-07 07:37:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:37:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.133333333333334) internal successors, (154), 30 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 07:37:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:37:32,334 INFO L225 Difference]: With dead ends: 176 [2021-11-07 07:37:32,334 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 07:37:32,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=338, Invalid=592, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:37:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 07:37:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-11-07 07:37:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2021-11-07 07:37:32,362 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2021-11-07 07:37:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:37:32,362 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2021-11-07 07:37:32,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.133333333333334) internal successors, (154), 30 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:37:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2021-11-07 07:37:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 07:37:32,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:37:32,364 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:37:32,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:37:32,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 07:37:32,565 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:37:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:37:32,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 20 times [2021-11-07 07:37:32,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:37:32,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114864769] [2021-11-07 07:37:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:37:32,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:37:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:37:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 72 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:35,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:37:35,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114864769] [2021-11-07 07:37:35,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114864769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:35,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963393537] [2021-11-07 07:37:35,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:37:35,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:37:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:37:35,153 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:37:35,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:37:37,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:37:37,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:37:37,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-07 07:37:37,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:37:37,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:37:37,825 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:37:37,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:37:37,901 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:37:37,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:37:38,083 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:37:38,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:37:38,198 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:37:38,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:37:38,420 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:37:38,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:37:38,567 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:37:38,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:37:38,892 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:37:38,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:37:39,085 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:37:39,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:37:39,426 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:37:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:37:39,655 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:37:39,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:37:40,069 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:37:40,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:37:40,365 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:37:40,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:37:40,867 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:37:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:37:41,226 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:37:41,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:37:41,815 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:37:41,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:37:42,250 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:37:42,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:37:42,938 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:37:42,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:37:43,412 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:37:43,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:37:44,071 INFO L354 Elim1Store]: treesize reduction 1450, result has 8.3 percent of original size [2021-11-07 07:37:44,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 201 [2021-11-07 07:37:44,558 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:37:44,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 183 treesize of output 204 [2021-11-07 07:37:45,328 INFO L354 Elim1Store]: treesize reduction 1690, result has 7.9 percent of original size [2021-11-07 07:37:45,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-07 07:37:46,019 INFO L354 Elim1Store]: treesize reduction 1860, result has 7.2 percent of original size [2021-11-07 07:37:46,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 197 treesize of output 221 [2021-11-07 07:37:47,457 INFO L354 Elim1Store]: treesize reduction 1860, result has 7.2 percent of original size [2021-11-07 07:37:47,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 203 treesize of output 227 [2021-11-07 07:37:55,521 INFO L354 Elim1Store]: treesize reduction 1376, result has 0.2 percent of original size [2021-11-07 07:37:55,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 197 treesize of output 94 [2021-11-07 07:37:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 290 proven. 323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:37:55,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963393537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:37:55,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:37:55,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 55] total 85 [2021-11-07 07:37:55,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128938772] [2021-11-07 07:37:55,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-07 07:37:55,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:37:55,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-07 07:37:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=5842, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 07:37:55,617 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 85 states, 85 states have (on average 2.4705882352941178) internal successors, (210), 85 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:07,084 INFO L93 Difference]: Finished difference Result 236 states and 252 transitions. [2021-11-07 07:38:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-07 07:38:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.4705882352941178) internal successors, (210), 85 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 07:38:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:07,086 INFO L225 Difference]: With dead ends: 236 [2021-11-07 07:38:07,086 INFO L226 Difference]: Without dead ends: 234 [2021-11-07 07:38:07,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 57 SyntacticMatches, 21 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11197 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=4522, Invalid=29518, Unknown=0, NotChecked=0, Total=34040 [2021-11-07 07:38:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-07 07:38:07,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 113. [2021-11-07 07:38:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2021-11-07 07:38:07,113 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 108 [2021-11-07 07:38:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:07,113 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2021-11-07 07:38:07,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.4705882352941178) internal successors, (210), 85 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2021-11-07 07:38:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:38:07,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:07,115 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:07,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:07,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:07,336 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:07,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 21 times [2021-11-07 07:38:07,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:07,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142583330] [2021-11-07 07:38:07,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:07,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:07,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:07,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142583330] [2021-11-07 07:38:07,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142583330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:07,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362714725] [2021-11-07 07:38:07,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:38:07,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:07,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:07,607 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:07,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:38:10,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-07 07:38:10,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:10,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:38:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:11,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362714725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:11,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:11,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30] total 32 [2021-11-07 07:38:11,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257641760] [2021-11-07 07:38:11,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:38:11,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:11,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:38:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=627, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:38:11,336 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:11,557 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2021-11-07 07:38:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:38:11,557 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 07:38:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:11,559 INFO L225 Difference]: With dead ends: 188 [2021-11-07 07:38:11,559 INFO L226 Difference]: Without dead ends: 119 [2021-11-07 07:38:11,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=384, Invalid=672, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:38:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-07 07:38:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-11-07 07:38:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2021-11-07 07:38:11,584 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2021-11-07 07:38:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:11,584 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2021-11-07 07:38:11,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.1875) internal successors, (166), 32 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2021-11-07 07:38:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 07:38:11,585 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:11,585 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:11,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:11,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:38:11,786 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:11,786 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 22 times [2021-11-07 07:38:11,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:11,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655090865] [2021-11-07 07:38:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:11,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 40 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:13,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:13,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655090865] [2021-11-07 07:38:13,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655090865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:13,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622343535] [2021-11-07 07:38:13,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:38:13,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:13,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:13,026 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:13,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:38:15,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:38:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-07 07:38:15,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:15,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:38:15,601 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:38:15,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:38:15,659 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:38:15,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:38:15,791 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:38:15,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:38:15,879 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:38:15,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:38:16,047 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:38:16,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:38:16,159 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:38:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:38:16,372 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:38:16,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:38:16,513 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:38:16,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:38:16,777 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:38:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:38:16,978 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:38:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:38:17,301 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:38:17,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:38:17,522 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:38:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:38:17,898 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:38:17,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:38:18,170 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:38:18,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:38:18,635 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:38:18,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:38:18,958 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:38:18,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:38:19,484 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:38:19,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:38:19,898 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:38:19,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:38:20,512 INFO L354 Elim1Store]: treesize reduction 1450, result has 8.3 percent of original size [2021-11-07 07:38:20,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 201 [2021-11-07 07:38:20,992 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:38:20,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 183 treesize of output 204 [2021-11-07 07:38:21,757 INFO L354 Elim1Store]: treesize reduction 1690, result has 7.9 percent of original size [2021-11-07 07:38:21,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-07 07:38:22,342 INFO L354 Elim1Store]: treesize reduction 1860, result has 7.2 percent of original size [2021-11-07 07:38:22,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 197 treesize of output 221 [2021-11-07 07:38:23,216 INFO L354 Elim1Store]: treesize reduction 1948, result has 7.4 percent of original size [2021-11-07 07:38:23,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 200 treesize of output 235 [2021-11-07 07:38:23,914 INFO L354 Elim1Store]: treesize reduction 2132, result has 6.9 percent of original size [2021-11-07 07:38:23,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 104 case distinctions, treesize of input 211 treesize of output 238 [2021-11-07 07:38:25,329 INFO L354 Elim1Store]: treesize reduction 2132, result has 6.9 percent of original size [2021-11-07 07:38:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 104 case distinctions, treesize of input 217 treesize of output 244 [2021-11-07 07:38:33,093 INFO L354 Elim1Store]: treesize reduction 1594, result has 0.2 percent of original size [2021-11-07 07:38:33,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 210 treesize of output 99 [2021-11-07 07:38:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 340 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:33,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622343535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:33,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:33,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 59] total 79 [2021-11-07 07:38:33,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778061577] [2021-11-07 07:38:33,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 07:38:33,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:33,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 07:38:33,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=5076, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:38:33,189 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 79 states, 79 states have (on average 2.8987341772151898) internal successors, (229), 79 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:50,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:50,648 INFO L93 Difference]: Finished difference Result 252 states and 269 transitions. [2021-11-07 07:38:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-11-07 07:38:50,648 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.8987341772151898) internal successors, (229), 79 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 07:38:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:50,650 INFO L225 Difference]: With dead ends: 252 [2021-11-07 07:38:50,650 INFO L226 Difference]: Without dead ends: 250 [2021-11-07 07:38:50,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 71 SyntacticMatches, 36 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14510 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=5005, Invalid=36407, Unknown=0, NotChecked=0, Total=41412 [2021-11-07 07:38:50,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-07 07:38:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 121. [2021-11-07 07:38:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2021-11-07 07:38:50,681 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2021-11-07 07:38:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:50,682 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2021-11-07 07:38:50,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.8987341772151898) internal successors, (229), 79 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2021-11-07 07:38:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 07:38:50,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:50,682 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:50,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:50,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:50,883 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:50,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:50,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1492478465, now seen corresponding path program 23 times [2021-11-07 07:38:50,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:50,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166259999] [2021-11-07 07:38:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:50,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:51,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:51,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166259999] [2021-11-07 07:38:51,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166259999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:51,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549983957] [2021-11-07 07:38:51,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:38:51,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:51,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:51,139 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:51,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:38:54,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-11-07 07:38:54,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:38:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:38:54,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:55,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549983957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:55,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:38:55,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32] total 34 [2021-11-07 07:38:55,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604262269] [2021-11-07 07:38:55,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:38:55,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:55,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:38:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=709, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:38:55,245 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 34 states, 34 states have (on average 5.235294117647059) internal successors, (178), 34 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:55,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:55,524 INFO L93 Difference]: Finished difference Result 200 states and 205 transitions. [2021-11-07 07:38:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:38:55,525 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.235294117647059) internal successors, (178), 34 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-07 07:38:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:38:55,526 INFO L225 Difference]: With dead ends: 200 [2021-11-07 07:38:55,526 INFO L226 Difference]: Without dead ends: 127 [2021-11-07 07:38:55,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=433, Invalid=757, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:38:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-07 07:38:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-07 07:38:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-11-07 07:38:55,565 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 120 [2021-11-07 07:38:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:38:55,565 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-11-07 07:38:55,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.235294117647059) internal successors, (178), 34 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:38:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-11-07 07:38:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 07:38:55,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:38:55,567 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:55,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 07:38:55,781 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:38:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:55,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 24 times [2021-11-07 07:38:55,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:55,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322879842] [2021-11-07 07:38:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:55,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 80 proven. 747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:57,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:57,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322879842] [2021-11-07 07:38:57,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322879842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:57,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702938438] [2021-11-07 07:38:57,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:38:57,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:57,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:57,986 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:57,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:39:04,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-07 07:39:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:04,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-07 07:39:04,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:04,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:39:05,059 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:39:05,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:39:05,113 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:39:05,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:39:05,269 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:39:05,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:39:05,364 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:39:05,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:39:05,538 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:39:05,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:39:05,647 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:39:05,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:39:05,882 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:39:05,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:39:06,049 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:39:06,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:39:06,367 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:39:06,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:39:06,564 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:39:06,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:39:06,928 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:39:06,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:39:07,162 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:39:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:39:07,574 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:39:07,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:39:07,856 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:39:07,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:39:08,356 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:39:08,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:39:08,737 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:39:08,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:39:09,371 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:39:09,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:39:09,844 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:39:09,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:39:10,514 INFO L354 Elim1Store]: treesize reduction 1450, result has 8.3 percent of original size [2021-11-07 07:39:10,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 201 [2021-11-07 07:39:11,067 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:39:11,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 183 treesize of output 204 [2021-11-07 07:39:11,988 INFO L354 Elim1Store]: treesize reduction 1690, result has 7.9 percent of original size [2021-11-07 07:39:11,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-07 07:39:12,707 INFO L354 Elim1Store]: treesize reduction 1860, result has 7.2 percent of original size [2021-11-07 07:39:12,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 197 treesize of output 221 [2021-11-07 07:39:13,743 INFO L354 Elim1Store]: treesize reduction 1948, result has 7.4 percent of original size [2021-11-07 07:39:13,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 200 treesize of output 235 [2021-11-07 07:39:14,534 INFO L354 Elim1Store]: treesize reduction 2132, result has 6.9 percent of original size [2021-11-07 07:39:14,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 104 case distinctions, treesize of input 211 treesize of output 238 [2021-11-07 07:39:15,687 INFO L354 Elim1Store]: treesize reduction 2224, result has 7.0 percent of original size [2021-11-07 07:39:15,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 214 treesize of output 252 [2021-11-07 07:39:16,746 INFO L354 Elim1Store]: treesize reduction 2422, result has 6.5 percent of original size [2021-11-07 07:39:16,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 225 treesize of output 255 [2021-11-07 07:39:18,772 INFO L354 Elim1Store]: treesize reduction 2422, result has 6.5 percent of original size [2021-11-07 07:39:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 231 treesize of output 261 [2021-11-07 07:39:29,695 INFO L354 Elim1Store]: treesize reduction 2098, result has 0.1 percent of original size [2021-11-07 07:39:29,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 241 treesize of output 104 [2021-11-07 07:39:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 394 proven. 433 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:29,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702938438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:29,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:29,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 62] total 97 [2021-11-07 07:39:29,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648400472] [2021-11-07 07:39:29,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 07:39:29,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:29,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 07:39:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=8577, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 07:39:29,828 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 97 states, 97 states have (on average 2.5257731958762886) internal successors, (245), 97 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:59,070 INFO L93 Difference]: Finished difference Result 269 states and 287 transitions. [2021-11-07 07:39:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-11-07 07:39:59,071 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.5257731958762886) internal successors, (245), 97 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-07 07:39:59,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:39:59,076 INFO L225 Difference]: With dead ends: 269 [2021-11-07 07:39:59,077 INFO L226 Difference]: Without dead ends: 267 [2021-11-07 07:39:59,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 91 SyntacticMatches, 26 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20749 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=7362, Invalid=52418, Unknown=0, NotChecked=0, Total=59780 [2021-11-07 07:39:59,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-07 07:39:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 129. [2021-11-07 07:39:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2021-11-07 07:39:59,150 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 124 [2021-11-07 07:39:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:39:59,151 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2021-11-07 07:39:59,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.5257731958762886) internal successors, (245), 97 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:39:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2021-11-07 07:39:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 07:39:59,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:39:59,153 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:59,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-07 07:39:59,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:39:59,357 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:39:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:59,358 INFO L85 PathProgramCache]: Analyzing trace with hash -321118800, now seen corresponding path program 25 times [2021-11-07 07:39:59,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:59,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355690791] [2021-11-07 07:39:59,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:59,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:59,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:59,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355690791] [2021-11-07 07:39:59,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355690791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:59,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545794950] [2021-11-07 07:39:59,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:39:59,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:59,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:59,747 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:59,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:40:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:40:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:05,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545794950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:05,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:05,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 34] total 36 [2021-11-07 07:40:05,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836179774] [2021-11-07 07:40:05,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:40:05,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:40:05,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=796, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:40:05,223 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:40:05,647 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2021-11-07 07:40:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:40:05,648 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-07 07:40:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:40:05,649 INFO L225 Difference]: With dead ends: 212 [2021-11-07 07:40:05,649 INFO L226 Difference]: Without dead ends: 135 [2021-11-07 07:40:05,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=485, Invalid=847, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:40:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-07 07:40:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-11-07 07:40:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2021-11-07 07:40:05,699 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2021-11-07 07:40:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:40:05,699 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2021-11-07 07:40:05,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:40:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2021-11-07 07:40:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 07:40:05,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:40:05,701 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:40:05,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:40:05,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:40:05,913 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:40:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:40:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1893103253, now seen corresponding path program 26 times [2021-11-07 07:40:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:40:05,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970433876] [2021-11-07 07:40:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:40:05,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:40:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:40:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 83 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:08,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:40:08,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970433876] [2021-11-07 07:40:08,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970433876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:08,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892917428] [2021-11-07 07:40:08,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:40:08,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:40:08,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:40:08,727 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:40:08,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:40:12,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:40:12,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:40:12,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-07 07:40:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:40:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:40:12,384 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:40:12,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:40:12,456 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:40:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:40:12,628 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:40:12,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:40:12,733 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:40:12,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:40:12,955 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:40:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:40:13,102 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:40:13,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:40:13,366 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:40:13,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:40:13,531 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:40:13,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:40:13,854 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:40:13,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:40:14,082 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:40:14,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:40:14,454 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:40:14,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:40:14,717 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:40:14,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:40:15,188 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:40:15,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:40:15,516 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:40:15,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:40:16,085 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:40:16,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:40:16,445 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:40:16,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:40:17,065 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:40:17,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:40:17,537 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:40:17,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:40:18,293 INFO L354 Elim1Store]: treesize reduction 1450, result has 8.3 percent of original size [2021-11-07 07:40:18,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 201 [2021-11-07 07:40:18,860 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:40:18,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 183 treesize of output 204 [2021-11-07 07:40:19,834 INFO L354 Elim1Store]: treesize reduction 1690, result has 7.9 percent of original size [2021-11-07 07:40:19,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-07 07:40:20,683 INFO L354 Elim1Store]: treesize reduction 1860, result has 7.2 percent of original size [2021-11-07 07:40:20,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 197 treesize of output 221 [2021-11-07 07:40:21,747 INFO L354 Elim1Store]: treesize reduction 1948, result has 7.4 percent of original size [2021-11-07 07:40:21,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 200 treesize of output 235 [2021-11-07 07:40:22,576 INFO L354 Elim1Store]: treesize reduction 2132, result has 6.9 percent of original size [2021-11-07 07:40:22,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 104 case distinctions, treesize of input 211 treesize of output 238 [2021-11-07 07:40:23,850 INFO L354 Elim1Store]: treesize reduction 2224, result has 7.0 percent of original size [2021-11-07 07:40:23,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 214 treesize of output 252 [2021-11-07 07:40:24,829 INFO L354 Elim1Store]: treesize reduction 2422, result has 6.5 percent of original size [2021-11-07 07:40:24,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 225 treesize of output 255 [2021-11-07 07:40:26,225 INFO L354 Elim1Store]: treesize reduction 2518, result has 6.7 percent of original size [2021-11-07 07:40:26,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 228 treesize of output 269 [2021-11-07 07:40:27,429 INFO L354 Elim1Store]: treesize reduction 2730, result has 6.2 percent of original size [2021-11-07 07:40:27,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 135 case distinctions, treesize of input 239 treesize of output 272 [2021-11-07 07:40:29,783 INFO L354 Elim1Store]: treesize reduction 2730, result has 6.2 percent of original size [2021-11-07 07:40:29,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 135 case distinctions, treesize of input 245 treesize of output 278 [2021-11-07 07:40:44,108 INFO L354 Elim1Store]: treesize reduction 2078, result has 0.1 percent of original size [2021-11-07 07:40:44,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 236 treesize of output 109 [2021-11-07 07:40:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 452 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:40:44,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892917428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:40:44,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:40:44,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 67] total 101 [2021-11-07 07:40:44,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068349440] [2021-11-07 07:40:44,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-07 07:40:44,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:40:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-07 07:40:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1977, Invalid=8123, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 07:40:44,258 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 101 states, 101 states have (on average 2.5445544554455446) internal successors, (257), 101 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:04,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:04,490 INFO L93 Difference]: Finished difference Result 286 states and 305 transitions. [2021-11-07 07:41:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-07 07:41:04,490 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.5445544554455446) internal successors, (257), 101 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-07 07:41:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:04,493 INFO L225 Difference]: With dead ends: 286 [2021-11-07 07:41:04,493 INFO L226 Difference]: Without dead ends: 284 [2021-11-07 07:41:04,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 70 SyntacticMatches, 29 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19353 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=8363, Invalid=49959, Unknown=0, NotChecked=0, Total=58322 [2021-11-07 07:41:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-07 07:41:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 137. [2021-11-07 07:41:04,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-11-07 07:41:04,568 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 132 [2021-11-07 07:41:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:04,569 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-11-07 07:41:04,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.5445544554455446) internal successors, (257), 101 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-11-07 07:41:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 07:41:04,570 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:04,570 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:04,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:04,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:04,777 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1812265441, now seen corresponding path program 27 times [2021-11-07 07:41:04,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:04,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906374336] [2021-11-07 07:41:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:04,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 451 proven. 557 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:05,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:05,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906374336] [2021-11-07 07:41:05,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906374336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:05,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127237517] [2021-11-07 07:41:05,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:41:05,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:05,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:05,173 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:05,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:41:13,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-07 07:41:13,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 07:41:13,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 512 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:14,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127237517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:14,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:14,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 36] total 38 [2021-11-07 07:41:14,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630340579] [2021-11-07 07:41:14,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:41:14,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:41:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=888, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:41:14,205 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 38 states, 38 states have (on average 5.315789473684211) internal successors, (202), 38 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:41:14,652 INFO L93 Difference]: Finished difference Result 224 states and 229 transitions. [2021-11-07 07:41:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:41:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.315789473684211) internal successors, (202), 38 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-07 07:41:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:41:14,653 INFO L225 Difference]: With dead ends: 224 [2021-11-07 07:41:14,653 INFO L226 Difference]: Without dead ends: 143 [2021-11-07 07:41:14,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=540, Invalid=942, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:41:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-07 07:41:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-11-07 07:41:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2021-11-07 07:41:14,704 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2021-11-07 07:41:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:41:14,704 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2021-11-07 07:41:14,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.315789473684211) internal successors, (202), 38 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:41:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2021-11-07 07:41:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 07:41:14,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:41:14,705 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:41:14,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 07:41:14,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:14,909 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:41:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:41:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1505000092, now seen corresponding path program 28 times [2021-11-07 07:41:14,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:41:14,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528944092] [2021-11-07 07:41:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:41:14,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:41:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:41:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 49 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:16,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:41:16,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528944092] [2021-11-07 07:41:16,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528944092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:16,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734782456] [2021-11-07 07:41:16,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:41:16,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:41:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:41:16,820 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:41:16,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:41:21,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:41:21,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:41:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-07 07:41:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:41:21,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:41:21,814 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:41:21,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:41:21,886 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:41:21,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:41:22,054 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:41:22,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:41:22,155 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:41:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:41:22,343 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:41:22,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:41:22,500 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:41:22,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:41:22,727 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:41:22,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:41:22,876 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:41:22,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:41:23,173 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:41:23,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:41:23,356 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:41:23,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:41:23,724 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:41:23,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:41:24,010 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:41:24,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:41:24,474 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:41:24,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:41:24,803 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:41:24,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:41:25,345 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:41:25,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:41:25,733 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:41:25,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:41:26,398 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:41:26,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:41:26,887 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:41:26,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:41:27,611 INFO L354 Elim1Store]: treesize reduction 1450, result has 8.3 percent of original size [2021-11-07 07:41:27,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 201 [2021-11-07 07:41:28,174 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:41:28,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 183 treesize of output 204 [2021-11-07 07:41:29,026 INFO L354 Elim1Store]: treesize reduction 1690, result has 7.9 percent of original size [2021-11-07 07:41:29,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-07 07:41:29,700 INFO L354 Elim1Store]: treesize reduction 1860, result has 7.2 percent of original size [2021-11-07 07:41:29,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 197 treesize of output 221 [2021-11-07 07:41:30,750 INFO L354 Elim1Store]: treesize reduction 1948, result has 7.4 percent of original size [2021-11-07 07:41:30,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 200 treesize of output 235 [2021-11-07 07:41:31,558 INFO L354 Elim1Store]: treesize reduction 2132, result has 6.9 percent of original size [2021-11-07 07:41:31,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 104 case distinctions, treesize of input 211 treesize of output 238 [2021-11-07 07:41:32,750 INFO L354 Elim1Store]: treesize reduction 2224, result has 7.0 percent of original size [2021-11-07 07:41:32,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 214 treesize of output 252 [2021-11-07 07:41:33,705 INFO L354 Elim1Store]: treesize reduction 2422, result has 6.5 percent of original size [2021-11-07 07:41:33,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 225 treesize of output 255 [2021-11-07 07:41:35,277 INFO L354 Elim1Store]: treesize reduction 2518, result has 6.7 percent of original size [2021-11-07 07:41:35,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 228 treesize of output 269 [2021-11-07 07:41:36,463 INFO L354 Elim1Store]: treesize reduction 2730, result has 6.2 percent of original size [2021-11-07 07:41:36,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 135 case distinctions, treesize of input 239 treesize of output 272 [2021-11-07 07:41:38,124 INFO L354 Elim1Store]: treesize reduction 2830, result has 6.4 percent of original size [2021-11-07 07:41:38,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 242 treesize of output 286 [2021-11-07 07:41:39,500 INFO L354 Elim1Store]: treesize reduction 3056, result has 5.9 percent of original size [2021-11-07 07:41:39,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 152 case distinctions, treesize of input 253 treesize of output 289 [2021-11-07 07:41:42,033 INFO L354 Elim1Store]: treesize reduction 3056, result has 5.9 percent of original size [2021-11-07 07:41:42,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 152 case distinctions, treesize of input 259 treesize of output 295 [2021-11-07 07:41:57,651 INFO L354 Elim1Store]: treesize reduction 2344, result has 0.1 percent of original size [2021-11-07 07:41:57,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 249 treesize of output 114 [2021-11-07 07:41:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 514 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:41:57,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734782456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:41:57,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:41:57,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 71] total 94 [2021-11-07 07:41:57,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811661652] [2021-11-07 07:41:57,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-07 07:41:57,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:41:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-07 07:41:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1518, Invalid=7224, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 07:41:57,824 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 94 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 94 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:26,703 INFO L93 Difference]: Finished difference Result 303 states and 323 transitions. [2021-11-07 07:42:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-07 07:42:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 94 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-07 07:42:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:26,705 INFO L225 Difference]: With dead ends: 303 [2021-11-07 07:42:26,706 INFO L226 Difference]: Without dead ends: 301 [2021-11-07 07:42:26,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 86 SyntacticMatches, 45 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21377 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=7078, Invalid=53192, Unknown=0, NotChecked=0, Total=60270 [2021-11-07 07:42:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-07 07:42:26,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 145. [2021-11-07 07:42:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2021-11-07 07:42:26,758 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2021-11-07 07:42:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:26,759 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2021-11-07 07:42:26,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 94 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2021-11-07 07:42:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 07:42:26,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:26,760 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:26,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:26,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:26,960 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash 677505682, now seen corresponding path program 29 times [2021-11-07 07:42:26,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:26,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127449782] [2021-11-07 07:42:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:26,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 513 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:27,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:27,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127449782] [2021-11-07 07:42:27,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127449782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:27,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507212324] [2021-11-07 07:42:27,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:42:27,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:27,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:27,306 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:27,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:42:34,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:42:34,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:34,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:42:34,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:35,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507212324] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:35,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:42:35,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 38] total 40 [2021-11-07 07:42:35,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726446266] [2021-11-07 07:42:35,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:42:35,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:42:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:42:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=985, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:42:35,398 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 40 states, 40 states have (on average 5.35) internal successors, (214), 40 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:42:35,730 INFO L93 Difference]: Finished difference Result 236 states and 241 transitions. [2021-11-07 07:42:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:42:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.35) internal successors, (214), 40 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-07 07:42:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:42:35,731 INFO L225 Difference]: With dead ends: 236 [2021-11-07 07:42:35,732 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 07:42:35,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:42:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 07:42:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2021-11-07 07:42:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2021-11-07 07:42:35,807 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 144 [2021-11-07 07:42:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:42:35,807 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2021-11-07 07:42:35,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.35) internal successors, (214), 40 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:42:35,808 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2021-11-07 07:42:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 07:42:35,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:42:35,809 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:42:35,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 07:42:36,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:36,024 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:42:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:42:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2089713741, now seen corresponding path program 30 times [2021-11-07 07:42:36,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:42:36,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671740610] [2021-11-07 07:42:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:42:36,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:42:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:42:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 52 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:42:37,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:42:37,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671740610] [2021-11-07 07:42:37,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671740610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:42:37,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834464519] [2021-11-07 07:42:37,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:42:37,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:42:37,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:42:37,647 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:42:37,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:42:49,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:42:49,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:42:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-07 07:42:49,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:42:49,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:42:50,028 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:42:50,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:42:50,094 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:42:50,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:42:50,249 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:42:50,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:42:50,346 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:42:50,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:42:50,541 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:42:50,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:42:50,671 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:42:50,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:42:50,931 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:42:50,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:42:51,095 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:42:51,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:42:51,447 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:42:51,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:42:51,641 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:42:51,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:42:51,999 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:42:51,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:42:52,242 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:42:52,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:42:52,680 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:42:52,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:42:52,982 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:42:52,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:42:53,506 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:42:53,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:42:53,896 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:42:53,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:42:54,536 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:42:54,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:42:54,992 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:42:54,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:42:55,749 INFO L354 Elim1Store]: treesize reduction 1450, result has 8.3 percent of original size [2021-11-07 07:42:55,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 201 [2021-11-07 07:42:56,288 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:42:56,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 183 treesize of output 204 [2021-11-07 07:42:57,126 INFO L354 Elim1Store]: treesize reduction 1690, result has 7.9 percent of original size [2021-11-07 07:42:57,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-07 07:42:57,761 INFO L354 Elim1Store]: treesize reduction 1860, result has 7.2 percent of original size [2021-11-07 07:42:57,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 197 treesize of output 221 [2021-11-07 07:42:58,729 INFO L354 Elim1Store]: treesize reduction 1948, result has 7.4 percent of original size [2021-11-07 07:42:58,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 200 treesize of output 235 [2021-11-07 07:42:59,463 INFO L354 Elim1Store]: treesize reduction 2132, result has 6.9 percent of original size [2021-11-07 07:42:59,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 104 case distinctions, treesize of input 211 treesize of output 238 [2021-11-07 07:43:00,570 INFO L354 Elim1Store]: treesize reduction 2224, result has 7.0 percent of original size [2021-11-07 07:43:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 214 treesize of output 252 [2021-11-07 07:43:01,559 INFO L354 Elim1Store]: treesize reduction 2422, result has 6.5 percent of original size [2021-11-07 07:43:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 225 treesize of output 255 [2021-11-07 07:43:02,806 INFO L354 Elim1Store]: treesize reduction 2518, result has 6.7 percent of original size [2021-11-07 07:43:02,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 228 treesize of output 269 [2021-11-07 07:43:03,826 INFO L354 Elim1Store]: treesize reduction 2730, result has 6.2 percent of original size [2021-11-07 07:43:03,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 135 case distinctions, treesize of input 239 treesize of output 272 [2021-11-07 07:43:05,253 INFO L354 Elim1Store]: treesize reduction 2830, result has 6.4 percent of original size [2021-11-07 07:43:05,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 242 treesize of output 286 [2021-11-07 07:43:06,449 INFO L354 Elim1Store]: treesize reduction 3056, result has 5.9 percent of original size [2021-11-07 07:43:06,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 152 case distinctions, treesize of input 253 treesize of output 289 [2021-11-07 07:43:08,093 INFO L354 Elim1Store]: treesize reduction 3160, result has 6.1 percent of original size [2021-11-07 07:43:08,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 153 case distinctions, treesize of input 256 treesize of output 303 [2021-11-07 07:43:09,575 INFO L354 Elim1Store]: treesize reduction 3400, result has 5.7 percent of original size [2021-11-07 07:43:09,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 170 case distinctions, treesize of input 267 treesize of output 306 [2021-11-07 07:43:12,227 INFO L354 Elim1Store]: treesize reduction 3400, result has 5.7 percent of original size [2021-11-07 07:43:12,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 170 case distinctions, treesize of input 278 treesize of output 317 [2021-11-07 07:43:30,289 INFO L354 Elim1Store]: treesize reduction 3004, result has 0.1 percent of original size [2021-11-07 07:43:30,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 283 treesize of output 119 [2021-11-07 07:43:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834464519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:30,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:43:30,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 75] total 99 [2021-11-07 07:43:30,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852548972] [2021-11-07 07:43:30,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 07:43:30,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:43:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 07:43:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=8700, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 07:43:30,428 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 99 states, 99 states have (on average 2.95959595959596) internal successors, (293), 99 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:43:51,771 INFO L93 Difference]: Finished difference Result 246 states and 254 transitions. [2021-11-07 07:43:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-07 07:43:51,772 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.95959595959596) internal successors, (293), 99 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-07 07:43:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:43:51,773 INFO L225 Difference]: With dead ends: 246 [2021-11-07 07:43:51,773 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:43:51,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 77 SyntacticMatches, 48 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13582 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=3018, Invalid=37182, Unknown=0, NotChecked=0, Total=40200 [2021-11-07 07:43:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:43:51,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2021-11-07 07:43:51,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:51,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2021-11-07 07:43:51,836 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 148 [2021-11-07 07:43:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:43:51,837 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2021-11-07 07:43:51,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.95959595959596) internal successors, (293), 99 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:43:51,837 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2021-11-07 07:43:51,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-07 07:43:51,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:43:51,838 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:43:51,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:43:52,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 07:43:52,052 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:43:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:43:52,053 INFO L85 PathProgramCache]: Analyzing trace with hash 691296894, now seen corresponding path program 31 times [2021-11-07 07:43:52,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:43:52,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626066585] [2021-11-07 07:43:52,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:43:52,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:43:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 55 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:43:53,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:43:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626066585] [2021-11-07 07:43:53,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626066585] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:43:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581104559] [2021-11-07 07:43:53,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:43:53,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:43:53,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:43:53,941 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:43:53,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:43:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:43:59,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-07 07:43:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:43:59,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 07:43:59,751 INFO L354 Elim1Store]: treesize reduction 44, result has 21.4 percent of original size [2021-11-07 07:43:59,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-07 07:43:59,815 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 07:43:59,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 46 [2021-11-07 07:43:59,970 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-07 07:43:59,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-07 07:44:00,067 INFO L354 Elim1Store]: treesize reduction 222, result has 14.3 percent of original size [2021-11-07 07:44:00,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 71 treesize of output 68 [2021-11-07 07:44:00,265 INFO L354 Elim1Store]: treesize reduction 274, result has 14.9 percent of original size [2021-11-07 07:44:00,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 82 [2021-11-07 07:44:00,389 INFO L354 Elim1Store]: treesize reduction 332, result has 12.9 percent of original size [2021-11-07 07:44:00,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 85 treesize of output 85 [2021-11-07 07:44:00,632 INFO L354 Elim1Store]: treesize reduction 388, result has 13.4 percent of original size [2021-11-07 07:44:00,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 99 [2021-11-07 07:44:00,796 INFO L354 Elim1Store]: treesize reduction 460, result has 11.7 percent of original size [2021-11-07 07:44:00,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 99 treesize of output 102 [2021-11-07 07:44:01,121 INFO L354 Elim1Store]: treesize reduction 520, result has 12.2 percent of original size [2021-11-07 07:44:01,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 102 treesize of output 116 [2021-11-07 07:44:01,312 INFO L354 Elim1Store]: treesize reduction 606, result has 10.8 percent of original size [2021-11-07 07:44:01,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 113 treesize of output 119 [2021-11-07 07:44:01,667 INFO L354 Elim1Store]: treesize reduction 670, result has 11.1 percent of original size [2021-11-07 07:44:01,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 116 treesize of output 133 [2021-11-07 07:44:01,906 INFO L354 Elim1Store]: treesize reduction 770, result has 9.9 percent of original size [2021-11-07 07:44:01,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 127 treesize of output 136 [2021-11-07 07:44:02,335 INFO L354 Elim1Store]: treesize reduction 838, result has 10.3 percent of original size [2021-11-07 07:44:02,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 130 treesize of output 150 [2021-11-07 07:44:02,629 INFO L354 Elim1Store]: treesize reduction 952, result has 9.2 percent of original size [2021-11-07 07:44:02,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 141 treesize of output 153 [2021-11-07 07:44:03,177 INFO L354 Elim1Store]: treesize reduction 1024, result has 9.5 percent of original size [2021-11-07 07:44:03,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 144 treesize of output 167 [2021-11-07 07:44:03,532 INFO L354 Elim1Store]: treesize reduction 1152, result has 8.6 percent of original size [2021-11-07 07:44:03,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 155 treesize of output 170 [2021-11-07 07:44:04,101 INFO L354 Elim1Store]: treesize reduction 1228, result has 8.9 percent of original size [2021-11-07 07:44:04,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 158 treesize of output 184 [2021-11-07 07:44:04,526 INFO L354 Elim1Store]: treesize reduction 1370, result has 8.1 percent of original size [2021-11-07 07:44:04,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 169 treesize of output 187 [2021-11-07 07:44:05,216 INFO L354 Elim1Store]: treesize reduction 1450, result has 8.3 percent of original size [2021-11-07 07:44:05,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 172 treesize of output 201 [2021-11-07 07:44:05,747 INFO L354 Elim1Store]: treesize reduction 1606, result has 7.6 percent of original size [2021-11-07 07:44:05,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 77 case distinctions, treesize of input 183 treesize of output 204 [2021-11-07 07:44:06,550 INFO L354 Elim1Store]: treesize reduction 1690, result has 7.9 percent of original size [2021-11-07 07:44:06,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 186 treesize of output 218 [2021-11-07 07:44:07,133 INFO L354 Elim1Store]: treesize reduction 1860, result has 7.2 percent of original size [2021-11-07 07:44:07,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 90 case distinctions, treesize of input 197 treesize of output 221 [2021-11-07 07:44:08,150 INFO L354 Elim1Store]: treesize reduction 1948, result has 7.4 percent of original size [2021-11-07 07:44:08,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 200 treesize of output 235 [2021-11-07 07:44:08,961 INFO L354 Elim1Store]: treesize reduction 2132, result has 6.9 percent of original size [2021-11-07 07:44:08,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 104 case distinctions, treesize of input 211 treesize of output 238 [2021-11-07 07:44:10,014 INFO L354 Elim1Store]: treesize reduction 2224, result has 7.0 percent of original size [2021-11-07 07:44:10,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 214 treesize of output 252 [2021-11-07 07:44:10,893 INFO L354 Elim1Store]: treesize reduction 2422, result has 6.5 percent of original size [2021-11-07 07:44:10,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 119 case distinctions, treesize of input 225 treesize of output 255 [2021-11-07 07:44:12,111 INFO L354 Elim1Store]: treesize reduction 2518, result has 6.7 percent of original size [2021-11-07 07:44:12,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 228 treesize of output 269 [2021-11-07 07:44:13,134 INFO L354 Elim1Store]: treesize reduction 2730, result has 6.2 percent of original size [2021-11-07 07:44:13,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 135 case distinctions, treesize of input 239 treesize of output 272 [2021-11-07 07:44:14,557 INFO L354 Elim1Store]: treesize reduction 2830, result has 6.4 percent of original size [2021-11-07 07:44:14,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 242 treesize of output 286 [2021-11-07 07:44:15,725 INFO L354 Elim1Store]: treesize reduction 3056, result has 5.9 percent of original size [2021-11-07 07:44:15,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 152 case distinctions, treesize of input 253 treesize of output 289 [2021-11-07 07:44:17,346 INFO L354 Elim1Store]: treesize reduction 3160, result has 6.1 percent of original size [2021-11-07 07:44:17,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 153 case distinctions, treesize of input 256 treesize of output 303 [2021-11-07 07:44:18,845 INFO L354 Elim1Store]: treesize reduction 3400, result has 5.7 percent of original size [2021-11-07 07:44:18,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 170 case distinctions, treesize of input 267 treesize of output 306 [2021-11-07 07:44:20,683 INFO L354 Elim1Store]: treesize reduction 3508, result has 5.8 percent of original size [2021-11-07 07:44:20,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 270 treesize of output 320 [2021-11-07 07:44:22,306 INFO L354 Elim1Store]: treesize reduction 3762, result has 5.5 percent of original size [2021-11-07 07:44:22,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 281 treesize of output 323 [2021-11-07 07:44:25,107 INFO L354 Elim1Store]: treesize reduction 3762, result has 5.5 percent of original size [2021-11-07 07:44:25,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 287 treesize of output 329 [2021-11-07 07:44:42,011 INFO L354 Elim1Store]: treesize reduction 2924, result has 0.1 percent of original size [2021-11-07 07:44:42,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 275 treesize of output 124 [2021-11-07 07:44:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 650 proven. 701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:44:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581104559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:44:42,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:44:42,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 79] total 104 [2021-11-07 07:44:42,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847440961] [2021-11-07 07:44:42,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-07 07:44:42,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:44:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-07 07:44:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=8866, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 07:44:42,155 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 104 states, 104 states have (on average 2.9711538461538463) internal successors, (309), 104 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:24,227 INFO L93 Difference]: Finished difference Result 342 states and 366 transitions. [2021-11-07 07:45:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-11-07 07:45:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.9711538461538463) internal successors, (309), 104 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-07 07:45:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:24,230 INFO L225 Difference]: With dead ends: 342 [2021-11-07 07:45:24,230 INFO L226 Difference]: Without dead ends: 340 [2021-11-07 07:45:24,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 97 SyntacticMatches, 51 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27108 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=8812, Invalid=67088, Unknown=0, NotChecked=0, Total=75900 [2021-11-07 07:45:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-07 07:45:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 161. [2021-11-07 07:45:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2021-11-07 07:45:24,327 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 156 [2021-11-07 07:45:24,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:24,328 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2021-11-07 07:45:24,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.9711538461538463) internal successors, (309), 104 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2021-11-07 07:45:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 07:45:24,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:24,330 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:24,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:24,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:24,556 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:24,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:24,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1934297460, now seen corresponding path program 32 times [2021-11-07 07:45:24,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:24,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080404525] [2021-11-07 07:45:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:24,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 649 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:24,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:24,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080404525] [2021-11-07 07:45:24,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080404525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:24,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413933917] [2021-11-07 07:45:24,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:45:24,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:24,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:24,979 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:25,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:45:31,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:45:31,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:45:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:45:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:45:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:32,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413933917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:32,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:45:32,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 42] total 44 [2021-11-07 07:45:32,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351733295] [2021-11-07 07:45:32,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:45:32,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:45:32,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:45:32,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=1194, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:45:32,436 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 44 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:45:32,877 INFO L93 Difference]: Finished difference Result 267 states and 274 transitions. [2021-11-07 07:45:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:45:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 44 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-07 07:45:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:45:32,878 INFO L225 Difference]: With dead ends: 267 [2021-11-07 07:45:32,878 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 07:45:32,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=748, Invalid=1322, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:45:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 07:45:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-11-07 07:45:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2021-11-07 07:45:32,938 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 160 [2021-11-07 07:45:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:45:32,938 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2021-11-07 07:45:32,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.409090909090909) internal successors, (238), 44 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:45:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2021-11-07 07:45:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 07:45:32,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:45:32,939 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:45:32,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:45:33,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 07:45:33,140 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:45:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:45:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1178416849, now seen corresponding path program 33 times [2021-11-07 07:45:33,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:45:33,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724306224] [2021-11-07 07:45:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:45:33,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:45:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:45:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 58 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:45:35,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:45:35,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724306224] [2021-11-07 07:45:35,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724306224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:45:35,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085055725] [2021-11-07 07:45:35,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:45:35,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:45:35,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:45:35,233 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:45:35,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d15968-d10d-489f-b437-939dac7ed0f4/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process